Malicious PDF — malware analysis report

Static analysis result for SHA-256 0125355ebb2b675a…

MALICIOUS

PDF

77.5 KB Created: 2021-03-13 14:40:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 196a93b089bf765f1c772e4506dc5ae4 SHA-1: 496af96240dd94216c897bbc539ddf6f4b0c3651 SHA-256: 0125355ebb2b675ab15ffa70db32aa30e42a7b4ff5ff95cce33467e52bf24ace
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior. While no scripts were extracted, the presence of many external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/123?utm_term=apocalypse+now+movie+quotes PDF link annotation
    • http://geloritiveda.mygamesonline.org/assam_budget_speech_2020_19.pdfIn PDF document text
    • http://de-bewertung-id2842384.icu/how_to_draw_a_female_head_shapecdeea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500199/normal_5fe607ee4161b.pdfIn PDF document text
    • https://valezofijamope.weebly.com/uploads/1/3/4/4/134445284/xemen_zabowotamejak_sojonadegiweji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501996/normal_602b4a51cf5bb.pdfIn PDF document text
    • http://cardioactiveufficiale.site/group_dynamics_theory_research_and_practicejfa3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_602eac55c11f6.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/giginilubun.pdfIn PDF document text
    • http://redtea.space/namatesogj0u5l.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/how_to_bend_pipe_by_hand.pdfIn PDF document text
    • https://wofexajolevesi.weebly.com/uploads/1/3/5/3/135302186/pusudexibomifazasoz.pdfIn PDF document text
    • http://zelopaqq.xyz/889575525122d6a6.pdfIn PDF document text
    • http://instasale.company/642494359906ke98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_6002ea4a4af6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_5fd741c1bbb17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rovizomaguwex.atwebpages.com/fupapit.pdfIn PDF document text
    • http://muwuvago.atwebpages.com/fisurugifibax.pdfIn PDF document text
    • http://bitujiduruv.myartsonline.com/75528996484.pdfIn PDF document text
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_e459fb14b0fc40a596b779ffdbe2eb88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divikufifir/bosch_silence_plus_46_dba_wont_drain.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/pidaraku.pdfIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_2393120fc55c4cdba0730dbe5986f818.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/40710298355.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/regrouper_plusieurs_en_1_seul.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/aromatic_heterocycles.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF097 5352 bytes
SHA-256: 5707d77c8a68e10e0886136ddf386cfd03e03e49828fc58f806e95c8a9058a63
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 11096 bytes
SHA-256: f135dc744f75f9dab4931e1169aa92e6efde59d288bc44cacbbcace1fa7aafd5

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